Publicaciones

• ART

Spectral analysis and exponential or polynomial stability of some indefinite sign damped problems

F. Abdallah, D. Mercier, Serge Nicaise

In this paper, we consider two damped wave problems for which the damping terms are allowed to change their sign. Using a careful spectral analysis, we find critical values of the damping coefficients for which the problem becomes exponentially or polynomially stable up to these critical values.

Evolution Equations and Control Theory, 2013, 2, pp.1-33. ⟨10.3934/eect.2013.2.1⟩. ⟨hal-03134858⟩

• ART

Residual-based a posteriori estimators for the T/Omega magnetodynamic harmonic formulation of the Maxwell system

Emmanuel Creusé, Serge Nicaise, Zuqi Tang, Yvonnick Le Menach, Nicolas Nemitz, Francis Piriou

In this paper, we focus on an a posteriori residual-based error estimator for the T/Omega magnetodynamic harmonic formulation of the Maxwell system. Similarly to the A/Phi formulation, the weak continuous and discrete formulations are established, and the well-posedness of both of them is addressed...

International Journal of Numerical Analysis and Modeling, 2013, 10 (2), pp.411-429. ⟨10.1142/S021820251150028X⟩. ⟨hal-00777601⟩

• ART

Residual and Equilibrated Error Estimators for Magnetostatic Problems Solved by Finite Element Method

Zuqi Tang, Yvonnick Le Menach, Emmanuel Creusé, Serge Nicaise, Francis Piriou, Nicolas Nemitz

In finite element computations, the choice of the mesh is crucial to obtain accurate solutions. In order to evaluate the quality of the mesh, a posteriori error estimators can be used. In this paper, we develop residual-based error estimators for magnetostatic problems with both classical...

IEEE Transactions on Magnetics, 2013, 49 (12), pp.5715-5723. ⟨10.1109/TMAG.2013.2271993⟩. ⟨hal-00910314⟩

• COUV

Les céramiques pour l’électronique et l’électrotechnique

Catherine Elissalde, Sylvain Marinel, Jean-Claude Nièpce, Alain Beauger, Christian Eric Bruzek, Christian Courtois, Jean Denape, Jean Pierre Ganne, Arnaud Girard, Richard Lebourgeois, Mario Maglione, Jean-Frédéric Martin, Michel Paté

Ce chapitre est consacré au très vaste domaine des céramiques pour l’électronique et l’électrotechnique : céramiques résistives, conductrices, supraconductrices, diélectriques, magnétiques, linéaires ou non linéaires, piézoélectriques, multifonctionnelles. En perpétuelle évolution: de plus en...

Gilbert Fantozzi; Jean-Claude Nièpce; Guillaume Bonnefont. Les céramiques industrielles : propriétés, mise en forme et applications, Dunod, pp.269-321, 2013, 978-2-10-057739-2. ⟨hal-04163876⟩

• COMM

Frittage micro-ondes en cavité monomode de biocéramiques

Etienne Savary, Anthony Thuault, Jean-Christophe Hornez, Michel Descamps, Sylvain Marinel, Anne Leriche

Le but premier de cette étude est de montrer la faisabilité du frittage direct en cavité micro-ondes monomode de deux biomatériaux céramiques : l'hydroxyapatite et le phosphate tri-calcique. Ainsi, cette étude montre que ce procédé a permis d'obtenir, en des temps très courts, inférieurs..., The main purpose of this study consists in investigating the direct microwaves sintering in a single mode cavity of two bioceramics: hydroxyapatite and tri-calcium phosphate. Thus, dense samples presenting fine microstructures are successfully obtained in less than 20 minutes of irradiation. The...

Journées Annuelles de la SF2M 2013 / SF2M Annual Meeting 2013, Oct 2013, Villeneuve d'Ascq, France. pp.04017, ⟨10.1051/matecconf/20130704017⟩. ⟨hal-02450325⟩

• COUV

Energy flow above the threshold of tunnel effect

Felix Ali Mehmeti, Virginie Régnier, R. Haller-Dintelmann

Almeida, Alexandre; Castro, Luís; Speck, Frank-Olme. Advances in Harmonic Analysis and Operator Theory, 229, Springer Verlag, pp.65-76, 2013, Operator Theory: Advances and Applications, 978-3-0348-0515-5. ⟨hal-03227696⟩

• ART

Photocatalytic solution discoloration and self-cleaning by polyester fabric functionalized with ZnO nanorods

Munir Ashraf, Philippe Champagne, Anne Perwuelz, Campagne Christine, Anne Leriche

Polyester fabric was functionalized with ZnO nanorods grown by hydrothermal method. The ZnO seeds were deposited on fabric which provided the sites for growth of nanorods. The functionalized fabric showed self-cleaning by degrading color stains and solution discoloration under the effect of...

Journal of Industrial Textiles, 2013, 44 (6), pp.884-898. ⟨10.1177/1528083713519662⟩. ⟨hal-03121037⟩

• ART

Option pricing with constant elasticity of variance (CEV) model

Rajae Aboulaich, M. L. Hadji, Abdelilah Jraifi

In this work we propose an approximate numerical method for pricing of options for the constant elasticity of variance (CEV) diffusion model. We prove firstly the existence and uniqueness of the solution in weighted Sobolev space, and then we propose the finite element method and finite difference...

Applied Mathematical Sciences, 2013, 7 (109), pp.5443-5456. ⟨10.12988/ams.2013.36339⟩. ⟨hal-03135010⟩

• ART

Lower and upper solutions for the heat equation on a polygonal domain of R2

Colette De Coster, Serge Nicaise

We consider the nonlinear periodic-Dirichlet heat equation on a polygonal domain of the plane in weighted Lp-Sobolev spaces equation presented Here f is Lp(0; T;Lpμ(Ω)-Caratheodory, where L pμ(Ω) = {v ε Lploc(Ω) : rμv ε Lp(Ω)}, with a real parameter μ and r(x) the distance from x to the set of...

Differential and integral equations, 2013, 26 (5/6), pp.603-622. ⟨hal-03137717⟩

• ART

Reducing crosstalk in array structures by controlling the excitation voltage of individual elements : a feasibility study

Abdelmajid Bybi, Sébastien Grondel, Jamal Assaad, Anne-Christine Hladky, Christian Granger, Mohamed Rguiti

This paper describes a procedure to minimize crosstalk between the individual elements of a piezoelectric transducer array. A two-dimensional finite elements model was developed and the excitation voltages predicted by the model were applied to the array prototypes made of PZT 27 ceramic. Symmetric...

Ultrasonics, 2013, 53 (6), pp.1135-1140. ⟨10.1016/j.ultras.2013.02.009⟩. ⟨hal-00823966⟩